Unfortunately, the delivery via Amazon did not work as usual in the promised 48 hours even though I paid extra for the shipping charge a surcharge. Then specify even the audacity of DHL in the shipment tracking, that an unsuccessful delivery took place, although constantly someone is at home and no message in the mailbox was. Well was already seen on TV on N3: When the stricken delivery (I'm serious) fail to comply with the traditions, just a little is tricked, to gain air. But now to the device: Looks optically good and makes a stable impression. I wanted the device actually take in the apartment where I was in the cold season the shack with a Gahsheizer of Delonghi for about 1 hour aufheize after arriving to a certain level of heat to bekommen.Danach runs an infrared heater overcurrent. The test much so now, unfortunately, since DHL has not geleifert time. During the test at home in the boiler room (gas) all is well. Remains to be seen whether the device actually holds 7 years, a date of manufacture is not printed. The manual is understandable in German, detailed and easily.